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The FIMMA product is running in Demonstration mode within the Satellite Services Division (SSD). Products are currently being made from available NOAA-15 (~7:30 am and pm, local time), NOAA-16 (~1:30 am, local time) and NOAA-17 (~10:30 am and pm, local time) passes, which have 3.7 micron measurements. The orbital data are available near-realtime, typically 3-6 hours after satellite overpass.
Users should note:
The original FIMMA algorithm was based on the scheme described in the paper "Satellite-based Detection of Canadian Boreal Fires: Development and Application of the Algorithm" by Dr. Zhanqing Li, (et al) of the Univ. of Maryland, modified with the addition of a slightly simplier method for nighttime fire detection. This was basically a threshold algorithm, with additional checks added in attempt to minimize false detects. Recently, the algorithm was rewritten as a contextual algorithm, which considers the characteristics of surrounding pixels before deciding if a hot pixel is likely to be a real fire. This was done considering methods used by several Fire groups, described in the another of Dr Li's papers, "A Review of AVHRR-based Active Fire Detection Algorithms: Principles, Limitations, and Recommendations", and Dr. Louis Giglio's (et al) paper "Evaluation of Global Fire Detection Algorithms using Simulated AVHRR Infrared Data" (Int. J. Remote Sensing, 1999, Vol 20, No 10, 1947-1985). It uses AVHRR channels 2 (.9 micron), 3b (3.7 micron), 4 (10.8 micron) and 5 (12 micron). Additional checks have been added to screen for noicy HRPT data
Here are plots of the last 24 hours of FIMMA detects, and yesterday's daily composite FIMMA fire product. The red "X's" are hot spots detected by this automated algorithm.
Contact Address: SSDFireTeam@noaa.gov
LAST MODIFIED: September 7, 2004
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Contact Information: SSDWe bmaster@noaa.gov |